<template>
  <div class="header">
    <!-- 折叠按钮 -->
    <div class="collapse-btn" @click="collapseChage">
      <i v-if="!collapse" class="el-icon-s-fold"></i>
      <i v-else class="el-icon-s-unfold"></i>
    </div>
    <div class="logo">
      <!-- Luigi の 乱七八糟 -->
      <span>Luigi の 乱七八糟</span>
    </div>
    <div class="header-right">
      <div class="header-user-con">
        <!-- 全屏显示 -->
        <div class="btn-fullscreen" @click="handleFullScreen">
          <el-tooltip
            effect="dark"
            :content="fullscreen ? `取消全屏` : `全屏`"
            placement="bottom"
          >
            <i class="el-icon-rank"></i>
          </el-tooltip>
        </div>
        <!-- 消息中心 -->
        <!-- <div class="btn-bell">
                    <el-tooltip
                        effect="dark"
                        :content="
                            message ? `有${message}条未读消息` : `消息中心`
                        "
                        placement="bottom"
                    >
                        <router-link to="/tabs">
                            <i class="el-icon-bell"></i>
                        </router-link>
                    </el-tooltip>
                    <span class="btn-bell-badge" v-if="message"></span>
                </div> -->
        <!-- 用户头像 -->
        <!-- <div class="user-avator">
                   <img src="../../assets/img/img.jpg" />
                </div> -->
        <!-- 用户名下拉菜单 -->
        <!-- <el-dropdown
                    class="user-name"
                    trigger="click"
                    @command="handleCommand"
                >
                    <span class="el-dropdown-link">
                        {{ username }}
                        <i class="el-icon-caret-bottom"></i>
                    </span>
                    <el-dropdown-menu slot="dropdown">
                        <a
                            href="https://github.com/lin-xin/vue-manage-system"
                            target="_blank"
                        >
                            <el-dropdown-item>项目仓库</el-dropdown-item>
                        </a>
                        <el-dropdown-item divided command="loginout"
                            >退出登录</el-dropdown-item
                        >
                    </el-dropdown-menu>
                </el-dropdown> -->
      </div>
    </div>
  </div>
</template>
<script>
import bus from "./bus"
export default {
  data () {
    return {
      collapse: false,
      fullscreen: false,
      name: "linxin",
      message: 2,
    }
  },
  computed: {
    username () {
      let username = localStorage.getItem("ms_username")
      return username || this.name
    },
  },
  methods: {
    // 用户名下拉菜单选择事件
    handleCommand (command) {
      if (command == "loginout") {
        localStorage.removeItem("ms_username")
        this.$router.push("/login")
      }
    },
    // 侧边栏折叠
    collapseChage () {
      this.collapse = !this.collapse
      bus.$emit("collapse", this.collapse)
    },
    // 全屏事件
    handleFullScreen () {
      let element = document.documentElement
      if (this.fullscreen) {
        if (document.exitFullscreen) {
          document.exitFullscreen()
        } else if (document.webkitCancelFullScreen) {
          document.webkitCancelFullScreen()
        } else if (document.mozCancelFullScreen) {
          document.mozCancelFullScreen()
        } else if (document.msExitFullscreen) {
          document.msExitFullscreen()
        }
      } else {
        if (element.requestFullscreen) {
          element.requestFullscreen()
        } else if (element.webkitRequestFullScreen) {
          element.webkitRequestFullScreen()
        } else if (element.mozRequestFullScreen) {
          element.mozRequestFullScreen()
        } else if (element.msRequestFullscreen) {
          // IE11
          element.msRequestFullscreen()
        }
      }
      this.fullscreen = !this.fullscreen
    },
  },
  mounted () {
    if (document.body.clientWidth < 1500) {
      this.collapseChage()
    }
  },
}
</script>
<style lang="less" scoped>
.header {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  height: 70px;
  font-size: 22px;
  color: #fff;
}
.header {
  background-color: #242f42;
}
.collapse-btn {
  float: left;
  padding: 0 21px;
  cursor: pointer;
  line-height: 70px;
}
.header .logo {
  float: left;
  width: 250px;
  line-height: 70px;
  & > span {
    display: block;
    position: relative;
    transition: all 0.8s;
    left: 0px;
  }
  &:hover > span {
    left: 200px;
  }
}
.header-right {
  float: right;
  padding-right: 50px;
}
.header-user-con {
  display: flex;
  height: 70px;
  align-items: center;
}
.btn-fullscreen {
  transform: rotate(45deg);
  margin-right: 5px;
  font-size: 24px;
}
.btn-bell,
.btn-fullscreen {
  position: relative;
  width: 30px;
  height: 30px;
  text-align: center;
  border-radius: 15px;
  cursor: pointer;
}
.btn-bell-badge {
  position: absolute;
  right: 0;
  top: -2px;
  width: 8px;
  height: 8px;
  border-radius: 4px;
  background: #f56c6c;
  color: #fff;
}
.btn-bell .el-icon-bell {
  color: #fff;
}
.user-name {
  margin-left: 10px;
}
.user-avator {
  margin-left: 20px;
}
.user-avator img {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 50%;
}
.el-dropdown-link {
  color: #fff;
  cursor: pointer;
}
.el-dropdown-menu__item {
  text-align: center;
}
</style>
